创建员工类Employee，属性有姓名name、能力值ability、年龄age（能力值为100-年龄），方法有doWork()，该方法执行一次，该员工的能力值减5，创建str()方法，打印该员工的信息

可以回答这个问题。以下是Employee类的代码：

class Employee:
    def __init__(self, name, age):
        self.name = name
        self.age = age
        self.ability = 100 - age

    def doWork(self):
        self.ability -= 5

    def str(self):
        return f"Name: {self.name}, Age: {self.age}, Ability: {self.ability}"

使用方法：

employee = Employee("John", 30)
print(employee.str())  # 输出：Name: John, Age: 30, Ability: 70
employee.doWork()
print(employee.str())  # 输出：Name: John, Age: 30, Ability: 65